Library 2.0 and Beyond is a great text for learning all about these technologies, and I love how this text gives further readings, additional resources, and websites at the end of each chapter.
Chapter 2 really made me ponder the idea of how much library websites and catalogs have and will continue to change. The academic library where I work does not seem close to adopting a catalog that allows our patrons to tag library materials within our collection. I also feel that being able to tag items in our catalog or write reviews about books we have is not "high priority" for many of our college students. Our text does mention that the University of Pennsylvania library has created its own tagging system called PennTags so tagging does seem to be making headway at academic libraries, just not so much at my library.
However, here at Schmidt Library, the way we search our OPAC will soon be getting much more user friendly as we will be getting a new search engine called Summon. Dartmouth has Summon and basically it is like Google search for libraries. If you have some time and want to check it out, you can test drive it at Dartmouth's site.
If you take a look at this site, notice how "streamlined" Dartmouth's library website looks, and if you try some test searches, let me know what you think. I am really excited about this new way of searching our catalog that will be coming next semester!